/*
 * Copyright (c) 1998, 2013, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 */

package javax.swing.plaf.metal;

import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Color;
import java.awt.Polygon;

import javax.swing.*;

import javax.swing.plaf.basic.BasicArrowButton;


/**
 * JButton object for Metal scrollbar arrows.
 * <p>
 * <strong>Warning:</strong>
 * Serialized objects of this class will not be compatible with
 * future Swing releases. The current serialization support is
 * appropriate for short term storage or RMI between applications running
 * the same version of Swing.  As of 1.4, support for long term storage
 * of all JavaBeans&trade;
 * has been added to the <code>java.beans</code> package.
 * Please see {@link java.beans.XMLEncoder}.
 *
 * @author Tom Santos
 * @author Steve Wilson
 */
public class MetalScrollButton extends BasicArrowButton {

  private static Color shadowColor;
  private static Color highlightColor;
  private boolean isFreeStanding = false;

  private int buttonWidth;

  public MetalScrollButton(int direction, int width, boolean freeStanding) {
    super(direction);

    shadowColor = UIManager.getColor("ScrollBar.darkShadow");
    highlightColor = UIManager.getColor("ScrollBar.highlight");

    buttonWidth = width;
    isFreeStanding = freeStanding;
  }

  public void setFreeStanding(boolean freeStanding) {
    isFreeStanding = freeStanding;
  }

  public void paint(Graphics g) {
    boolean leftToRight = MetalUtils.isLeftToRight(this);
    boolean isEnabled = getParent().isEnabled();

    Color arrowColor =
        isEnabled ? MetalLookAndFeel.getControlInfo() : MetalLookAndFeel.getControlDisabled();
    boolean isPressed = getModel().isPressed();
    int width = getWidth();
    int height = getHeight();
    int w = width;
    int h = height;
    int arrowHeight = (height + 1) / 4;
    int arrowWidth = (height + 1) / 2;

    if (isPressed) {
      g.setColor(MetalLookAndFeel.getControlShadow());
    } else {
      g.setColor(getBackground());
    }

    g.fillRect(0, 0, width, height);

    if (getDirection() == NORTH) {
      if (!isFreeStanding) {
        height += 1;
        g.translate(0, -1);
        width += 2;
        if (!leftToRight) {
          g.translate(-1, 0);
        }
      }

      // Draw the arrow
      g.setColor(arrowColor);
      int startY = ((h + 1) - arrowHeight) / 2;
      int startX = (w / 2);
      //                  System.out.println( "startX :" + startX + " startY :"+startY);
      for (int line = 0; line < arrowHeight; line++) {
        g.drawLine(startX - line, startY + line, startX + line + 1, startY + line);
      }
        /*      g.drawLine( 7, 6, 8, 6 );
                g.drawLine( 6, 7, 9, 7 );
                g.drawLine( 5, 8, 10, 8 );
                g.drawLine( 4, 9, 11, 9 );*/

      if (isEnabled) {
        g.setColor(highlightColor);

        if (!isPressed) {
          g.drawLine(1, 1, width - 3, 1);
          g.drawLine(1, 1, 1, height - 1);
        }

        g.drawLine(width - 1, 1, width - 1, height - 1);

        g.setColor(shadowColor);
        g.drawLine(0, 0, width - 2, 0);
        g.drawLine(0, 0, 0, height - 1);
        g.drawLine(width - 2, 2, width - 2, height - 1);
      } else {
        MetalUtils.drawDisabledBorder(g, 0, 0, width, height + 1);
      }
      if (!isFreeStanding) {
        height -= 1;
        g.translate(0, 1);
        width -= 2;
        if (!leftToRight) {
          g.translate(1, 0);
        }
      }
    } else if (getDirection() == SOUTH) {
      if (!isFreeStanding) {
        height += 1;
        width += 2;
        if (!leftToRight) {
          g.translate(-1, 0);
        }
      }

      // Draw the arrow
      g.setColor(arrowColor);

      int startY = (((h + 1) - arrowHeight) / 2) + arrowHeight - 1;
      int startX = (w / 2);

      //          System.out.println( "startX2 :" + startX + " startY2 :"+startY);

      for (int line = 0; line < arrowHeight; line++) {
        g.drawLine(startX - line, startY - line, startX + line + 1, startY - line);
      }

        /*      g.drawLine( 4, 5, 11, 5 );
                g.drawLine( 5, 6, 10, 6 );
                g.drawLine( 6, 7, 9, 7 );
                g.drawLine( 7, 8, 8, 8 ); */

      if (isEnabled) {
        g.setColor(highlightColor);

        if (!isPressed) {
          g.drawLine(1, 0, width - 3, 0);
          g.drawLine(1, 0, 1, height - 3);
        }

        g.drawLine(1, height - 1, width - 1, height - 1);
        g.drawLine(width - 1, 0, width - 1, height - 1);

        g.setColor(shadowColor);
        g.drawLine(0, 0, 0, height - 2);
        g.drawLine(width - 2, 0, width - 2, height - 2);
        g.drawLine(2, height - 2, width - 2, height - 2);
      } else {
        MetalUtils.drawDisabledBorder(g, 0, -1, width, height + 1);
      }

      if (!isFreeStanding) {
        height -= 1;
        width -= 2;
        if (!leftToRight) {
          g.translate(1, 0);
        }
      }
    } else if (getDirection() == EAST) {
      if (!isFreeStanding) {
        height += 2;
        width += 1;
      }

      // Draw the arrow
      g.setColor(arrowColor);

      int startX = (((w + 1) - arrowHeight) / 2) + arrowHeight - 1;
      int startY = (h / 2);

      //System.out.println( "startX2 :" + startX + " startY2 :"+startY);

      for (int line = 0; line < arrowHeight; line++) {
        g.drawLine(startX - line, startY - line, startX - line, startY + line + 1);
      }


/*              g.drawLine( 5, 4, 5, 11 );
                g.drawLine( 6, 5, 6, 10 );
                g.drawLine( 7, 6, 7, 9 );
                g.drawLine( 8, 7, 8, 8 );*/

      if (isEnabled) {
        g.setColor(highlightColor);

        if (!isPressed) {
          g.drawLine(0, 1, width - 3, 1);
          g.drawLine(0, 1, 0, height - 3);
        }

        g.drawLine(width - 1, 1, width - 1, height - 1);
        g.drawLine(0, height - 1, width - 1, height - 1);

        g.setColor(shadowColor);
        g.drawLine(0, 0, width - 2, 0);
        g.drawLine(width - 2, 2, width - 2, height - 2);
        g.drawLine(0, height - 2, width - 2, height - 2);
      } else {
        MetalUtils.drawDisabledBorder(g, -1, 0, width + 1, height);
      }
      if (!isFreeStanding) {
        height -= 2;
        width -= 1;
      }
    } else if (getDirection() == WEST) {
      if (!isFreeStanding) {
        height += 2;
        width += 1;
        g.translate(-1, 0);
      }

      // Draw the arrow
      g.setColor(arrowColor);

      int startX = (((w + 1) - arrowHeight) / 2);
      int startY = (h / 2);

      for (int line = 0; line < arrowHeight; line++) {
        g.drawLine(startX + line, startY - line, startX + line, startY + line + 1);
      }

        /*      g.drawLine( 6, 7, 6, 8 );
                g.drawLine( 7, 6, 7, 9 );
                g.drawLine( 8, 5, 8, 10 );
                g.drawLine( 9, 4, 9, 11 );*/

      if (isEnabled) {
        g.setColor(highlightColor);

        if (!isPressed) {
          g.drawLine(1, 1, width - 1, 1);
          g.drawLine(1, 1, 1, height - 3);
        }

        g.drawLine(1, height - 1, width - 1, height - 1);

        g.setColor(shadowColor);
        g.drawLine(0, 0, width - 1, 0);
        g.drawLine(0, 0, 0, height - 2);
        g.drawLine(2, height - 2, width - 1, height - 2);
      } else {
        MetalUtils.drawDisabledBorder(g, 0, 0, width + 1, height);
      }

      if (!isFreeStanding) {
        height -= 2;
        width -= 1;
        g.translate(1, 0);
      }
    }
  }

  public Dimension getPreferredSize() {
    if (getDirection() == NORTH) {
      return new Dimension(buttonWidth, buttonWidth - 2);
    } else if (getDirection() == SOUTH) {
      return new Dimension(buttonWidth, buttonWidth - (isFreeStanding ? 1 : 2));
    } else if (getDirection() == EAST) {
      return new Dimension(buttonWidth - (isFreeStanding ? 1 : 2), buttonWidth);
    } else if (getDirection() == WEST) {
      return new Dimension(buttonWidth - 2, buttonWidth);
    } else {
      return new Dimension(0, 0);
    }
  }

  public Dimension getMinimumSize() {
    return getPreferredSize();
  }

  public Dimension getMaximumSize() {
    return new Dimension(Integer.MAX_VALUE, Integer.MAX_VALUE);
  }

  public int getButtonWidth() {
    return buttonWidth;
  }
}
